Namuhla sethula ipayipi lensimbi elingenamthungo elivame ukusetshenziswa kawoyela, ipayipi likawoyela (GB9948-88) lilungele ishubhu yesithando somlilo sokucwenga uwoyela, isishintshi sokushisa kanye nepayipi elingenamthungo.

Ipayipi lensimbi lokumba i-geological drilling (YB235-70) isetshenziselwa ukumba okuyisisekelo ngomnyango we-geological, ongahlukaniswa ngepayipi lokubhoboza, ikhola yokubhoboza, ipayipi eliwumgogodla, ipayipi le-casing kanye nepayipi lemvula ngokuya ngokusetshenziswa kwalo.

Ipayipi likawoyela liwuhlobo lwensimbi ende enengxenye engenalutho futhi alihlanganisi nxazonke, kuyilapho ipayipi lokuqhekeka likaphethiloli liwuhlobo lwensimbi yesigaba somnotho.
I-API: Isifinyezo se-English American Petroleum Institute, incazelo yesiShayina ye-American Petroleum Institute.

I-OCTG: Kuyisifinyezo se-Oil Country Tubular Goods, okusho ukuthi ipayipi elikhethekile likawoyela ngesiShayina, okuhlanganisa i-Oil casing eqediwe, ipayipi lokubhoboza, ikhola yokubhoboza, ikhola, kanye nokuhlanganisa okufushane, njll.

I-Tubing: Ipayipi elisetshenziswa ekukhiqizeni uwoyela negesi, umjovo wamanzi, kanye nokuqhekeka kwe-asidi emthonjeni.

I-Casing: Ipayipi eligijima lisuka phezu komhlaba liye emgodini obhojwe kahle njengolwelwesi lokuvikela udonga ukuthi lungabhidliki.

Ipayipi lokubhoboza: ipayipi elisetshenziselwa ukubhoboza izimbobo.

Ipayipi: ipayipi elisetshenziselwa ukuhambisa uwoyela negesi.

Ikholomu: isilinda esinentambo yangaphakathi esetshenziselwa ukuxhuma amapayipi amabili anentambo.

Izinto zokuhlanganisa: ipayipi elisetshenziselwa ukwenza ukuhlanganisa.

Imicu ye-API: izintambo zamapayipi ezicaciswe ku-API 5B, okuhlanganisa imicu yamapayipi ayindilinga, imicu yepayipi eyindilinga emifushane, imicu yamapayipi ayindilinga ende, izintambo zamapayipi e-trapezoidal, izintambo zamapayipi, njll.

Intambo ekhethekile: uhlobo lwentambo okungeyona ye-API enokubekwa uphawu okukhethekile, ukujoyina nezinye izakhiwo.

Ukuhluleka: ukulahlekelwa umsebenzi wangempela ngenxa yokuguquguquka, ukuphuka nokulimala kwendawo ngaphansi kwezimo ezithile zesevisi. Izinhlobo eziyinhloko zokuhluleka kwe-casing yilezi: i-extrusion, ukushelela, ukuphuka, ukuvuza, ukugqwala, ukubopha, ukuguga nokunye.